Moteurs de stockage
InnoDB
Supports transactions, row-level locking, foreign keys and encryption for tables
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Variables
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Mémoire tampon
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État InnoDB
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2026-03-18 08:03:03 0x2f38 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 32 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 33051 srv_active, 0 srv_shutdown, 312235 srv_idle
srv_master_thread log flush and writes: 345286
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 55253
OS WAIT ARRAY INFO: signal count 54585
RW-shared spins 31340, rounds 929759, OS waits 30928
RW-excl spins 123, rounds 2735, OS waits 88
RW-sx spins 7, rounds 238, OS waits 7
Spin rounds per wait: 29.67 RW-shared, 22.24 RW-excl, 34.00 RW-sx
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TRANSACTIONS
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Trx id counter 42798310
Purge done for trx's n:o < 42798310 undo n:o < 0 state: running but idle
History list length 9
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 284289389002896, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284289389007064, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284289389011232, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
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FILE I/O
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I/O thread 0 state: native aio handle (insert buffer thread)
I/O thread 1 state: native aio handle (log thread)
I/O thread 2 state: native aio handle (read thread)
I/O thread 3 state: native aio handle (read thread)
I/O thread 4 state: native aio handle (read thread)
I/O thread 5 state: native aio handle (read thread)
I/O thread 6 state: native aio handle (write thread)
I/O thread 7 state: native aio handle (write thread)
I/O thread 8 state: native aio handle (write thread)
I/O thread 9 state: native aio handle (write thread)
Pending normal aio reads: [0, 0, 0, 0] , aio writes: [0, 0, 0, 0] ,
ibuf aio reads:, log i/o's:, sync i/o's:
Pending flushes (fsync) log: 0; buffer pool: 1
124480 OS file reads, 440709 OS file writes, 271933 OS fsyncs
20.59 reads/s, 16384 avg bytes/read, 10.84 writes/s, 5.87 fsyncs/s
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INSERT BUFFER AND ADAPTIVE HASH INDEX
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Ibuf: size 1, free list len 0, seg size 2, 0 merges
merged operations:
insert 0, delete mark 0, delete 0
discarded operations:
insert 0, delete mark 0, delete 0
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 0 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 0 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
23.37 hash searches/s, 100.00 non-hash searches/s
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LOG
---
Log sequence number 27243186875
Log flushed up to 27243186875
Pages flushed up to 27243175368
Last checkpoint at 27243153124
0 pending log flushes, 0 pending chkp writes
156229 log i/o's done, 3.78 log i/o's/second
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BUFFER POOL AND MEMORY
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Total large memory allocated 33554432
Dictionary memory allocated 247896
Buffer pool size 1003
Free buffers 741
Database pages 256
Old database pages 0
Modified db pages 35
Percent of dirty pages(LRU & free pages): 3.507
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 35, single page 0
Pages made young 2760, not young 57526
0.06 youngs/s, 47.47 non-youngs/s
Pages read 124377, created 3023, written 241014
20.59 reads/s, 0.06 creates/s, 6.22 writes/s
Buffer pool hit rate 944 / 1000, young-making rate 0 / 1000 not 128 / 1000
Pages read ahead 5.00/s, evicted without access 0.00/s, Random read ahead 0.00/s
LRU len: 256, unzip_LRU len: 0
I/O sum[747]:cur[39], unzip sum[0]:cur[0]
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ROW OPERATIONS
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0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Process ID=6040, Main thread ID=6624, state: sleeping
Number of rows inserted 262, updated 53774, deleted 14, read 22812569
0.00 inserts/s, 2.22 updates/s, 0.00 deletes/s, 971.13 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 6655
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
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END OF INNODB MONITOR OUTPUT
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